Merge branch 'nd/fopen-errors'

We often try to open a file for reading whose existence is
optional, and silently ignore errors from open/fopen; report such
errors if they are not due to missing files.

* nd/fopen-errors:
  mingw_fopen: report ENOENT for invalid file names
  mingw: verify that paths are not mistaken for remote nicknames
  log: fix memory leak in open_next_file()
  rerere.c: move error_errno() closer to the source system call
  print errno when reporting a system call error
  wrapper.c: make warn_on_inaccessible() static
  wrapper.c: add and use fopen_or_warn()
  wrapper.c: add and use warn_on_fopen_errors()
  config.mak.uname: set FREAD_READS_DIRECTORIES for Darwin, too
  config.mak.uname: set FREAD_READS_DIRECTORIES for Linux and FreeBSD
  clone: use xfopen() instead of fopen()
  use xfopen() in more places
  git_fopen: fix a sparse 'not declared' warning

wt-status.c

@@ -1066,7 +1066,8 @@ static void show_am_in_progress(struct wt_status *s,
 static char *read_line_from_git_path(const char *filename)
 {
 	struct strbuf buf = STRBUF_INIT;
-	FILE *fp = fopen(git_path("%s", filename), "r");
+	FILE *fp = fopen_or_warn(git_path("%s", filename), "r");
+
 	if (!fp) {
 		strbuf_release(&buf);
 		return NULL;